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External BEC...How to?

Can anyone help me understand how to wire a servo directly to power (Castle 10A BEC) an pull signal from my receiver (Traxxas 2218X)? For the life of me I an a friend cannot figure it out. We have tried two different castle BECs and 3 different servo brands with no luck. Does te Traxxas rx not support this kind of setup or am I missing somthing?

I am replacing the stock dual 2075 setup with one large high current draw servo and adding rear steer to my Summit powered by the same servo.

So I cut the red out of this y connector and plugged it into an old am receiver in the steering channel. Plugged the servo in one side, the bec in the other. hooked it up to a battery and it worked great.

Unplugged it from the old am receiver and into my summit and it melted the insulation of the black neg wire going to the esc and filled the room with smoke.
I unplugged it as fast as I could and it still seems to work, although I undoubtedly shortened it's life.

Sorry for the late reply, but as far as I can tell you figured it out at the end! That last picture seems pretty simple to me: BEC getting power direct from the battery.

Those little CC bec's are my fav, I am using two of them in my build!

Hey no biggie! Installation is easy now, all you need is a y connector with the red (+) wire snipped on the male end that plugs into your receiver. Then plug your bec into one female, plug the servo into the other.

JUST MAKE SURE YOU HOOK YOUR EXT BEC TO THE SAME SIDE AS THE INT BEC!!! Or you will fry your esc.

Hey krall...or anyone for that matter where are you putting the bec? I have a couple waterproof rx boxes that come stock on the summit on order but I'm worried about heat. I'm more worried about a random water splash, though, this thing looks vulnerable.

I'm not worried about waterproofing, I'm going to have so much non-waterproofable stuff on my car I've given up on the water worries heh. But heat isn't a big issue with those guys unless you're driving a lot constantly! =)

Another question though, are you still powering your ESC with two batteries? If you disconnect the power from the ESC to the RX, that second battery is now useless isn't it? I am looking to do this very setup:

One battery to power the motor through the ESC, and another to power everything else. But because I need the ESC to still get info from the RX, I would wire just the ground and the signal wire from the ESC to the RX, and the RX would receive power from my CC BEC via another battery.

Yeah I'm still running two batteries to my esc. My rx is still receiving power from the esc's int bec.

I might get another cc bec to power the rx (this includes the front steering servo) and take the internal bec out of the equation all together...from what I've read all I would need to do is cut the red wire from the esc.

Its a few more wires but might hold up better than the int bec. Just because the int bec will do it doesn't mean it's the best way...I dunno.

This is all new to me. With my 3.3 revo it was all about what can I take off to lighten it up. This Summit I just keep piling stuff on. She's gettin chubby to say the least.

Take a sharp knife and carefully lift up on the little tangs of plastic where you see the metal from the pins. Once this tang is lifted up, you should be able to pull the pin(s) out. Just don't lift too much or they will snap off.